Commit | Line | Data |
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d3372da9 | 1 | /* |
2 | * Dolda Connect - Modular multiuser Direct Connect-style client | |
302a2600 | 3 | * Copyright (C) 2004 Fredrik Tolf <fredrik@dolda2000.com> |
d3372da9 | 4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | /* XXX: Implement SOCKS proxyability */ | |
20 | ||
21 | #ifdef HAVE_CONFIG_H | |
22 | #include <config.h> | |
23 | #endif | |
24 | #include <string.h> | |
25 | #include <stdlib.h> | |
26 | #include <unistd.h> | |
27 | #include <fcntl.h> | |
28 | #include <sys/ioctl.h> | |
29 | #include <sys/socket.h> | |
30 | #include <sys/un.h> | |
72a7835e | 31 | #include <sys/select.h> |
d3372da9 | 32 | #include <arpa/inet.h> |
33 | #include <netinet/in.h> | |
34 | #include <netdb.h> | |
35 | #include <sys/signal.h> | |
7ab36fbd | 36 | #include <sys/stat.h> /* For rebindunix() */ |
d3372da9 | 37 | #ifdef HAVE_LINUX_SOCKIOS_H |
38 | #include <linux/sockios.h> | |
39 | #endif | |
40 | #include <errno.h> | |
41 | #include <net/if.h> | |
42 | ||
43 | #include "conf.h" | |
44 | #include "net.h" | |
45 | #include "module.h" | |
46 | #include "log.h" | |
47 | #include "utils.h" | |
48 | #include "sysevents.h" | |
49 | ||
50 | static struct configvar myvars[] = | |
51 | { | |
d9f89ef5 | 52 | /** The network mode to use. Currently supported values are 0 for |
53 | * active mode and 1 for passive mode. In the future, SOCKS5 proxy | |
54 | * support may be added. */ | |
d3372da9 | 55 | {CONF_VAR_INT, "mode", {.num = 0}}, |
d9f89ef5 | 56 | /** Set the SO_REUSEADDR socket option on listening sockets, so |
57 | * that dead TCP connections waiting for timeout are ignored. */ | |
347d6d76 | 58 | {CONF_VAR_BOOL, "reuseaddr", {.num = 0}}, |
d9f89ef5 | 59 | /** Overrides the IPv4 address reported to other clients in active |
60 | * mode. Useful for servers behind NAT routers. If both this and | |
61 | * net.publicif are unspecified the address of the hub connection | |
62 | * is used. */ | |
d3372da9 | 63 | {CONF_VAR_IPV4, "visibleipv4", {.ipv4 = {0}}}, |
d9f89ef5 | 64 | /** Specifies an interface name from which to fetch the IPv4 |
65 | * address reported to other clients in active mode. If both this | |
66 | * and net.visibleipv4 are unspecified the address of the hub | |
67 | * connection is used. */ | |
d3372da9 | 68 | {CONF_VAR_STRING, "publicif", {.str = L""}}, |
b020fb3d | 69 | /* Diffserv should be supported on IPv4, too, but I don't know the |
70 | * API to do that. */ | |
d9f89ef5 | 71 | /** The Diffserv value to use on IPv6 connections when the |
72 | * minimize cost TOS value is used (see the TOS VALUES | |
73 | * section). */ | |
b020fb3d | 74 | {CONF_VAR_INT, "diffserv-mincost", {.num = 0}}, |
d9f89ef5 | 75 | /** The Diffserv value to use on IPv6 connections when the |
76 | * maximize reliability TOS value is used (see the TOS VALUES | |
77 | * section). */ | |
b020fb3d | 78 | {CONF_VAR_INT, "diffserv-maxrel", {.num = 0}}, |
d9f89ef5 | 79 | /** The Diffserv value to use on IPv6 connections when the |
80 | * maximize throughput TOS value is used (see the TOS VALUES | |
81 | * section). */ | |
b020fb3d | 82 | {CONF_VAR_INT, "diffserv-maxtp", {.num = 0}}, |
d9f89ef5 | 83 | /** The Diffserv value to use on IPv6 connections when the |
84 | * minimize delay TOS value is used (see the TOS VALUES | |
85 | * section). */ | |
b020fb3d | 86 | {CONF_VAR_INT, "diffserv-mindelay", {.num = 0}}, |
d3372da9 | 87 | {CONF_VAR_END} |
88 | }; | |
89 | ||
02a705ad FT |
90 | #define UFD_SOCK 0 |
91 | #define UFD_PIPE 1 | |
92 | #define UFD_LISTEN 2 | |
93 | ||
94 | struct scons { | |
95 | struct scons *n, *p; | |
96 | struct socket *s; | |
97 | }; | |
98 | ||
99 | struct ufd { | |
100 | struct ufd *next, *prev; | |
101 | int fd; | |
102 | int type; | |
103 | int ignread; | |
104 | struct socket *sk; | |
105 | union { | |
106 | struct { | |
107 | int family; | |
108 | int type; | |
109 | struct sockaddr *remote; | |
110 | socklen_t remotelen; | |
111 | struct { | |
112 | uid_t uid; | |
113 | gid_t gid; | |
114 | } ucred; | |
115 | } s; | |
116 | struct { | |
117 | struct lport *lp; | |
118 | int family; | |
119 | } l; | |
120 | } d; | |
121 | }; | |
122 | ||
40c21c4f FT |
123 | static int getlocalname(int fd, struct sockaddr **namebuf, socklen_t *lenbuf); |
124 | ||
02a705ad FT |
125 | static struct ufd *ufds = NULL; |
126 | static struct scons *rbatch, *wbatch, *cbatch; | |
d3372da9 | 127 | int numsocks = 0; |
128 | ||
129 | /* XXX: Get autoconf for all this... */ | |
130 | int getpublicaddr(int af, struct sockaddr **addr, socklen_t *lenbuf) | |
131 | { | |
132 | struct sockaddr_in *ipv4; | |
133 | struct configvar *var; | |
134 | void *bufend; | |
135 | int sock; | |
136 | struct ifconf conf; | |
137 | struct ifreq *ifr, req; | |
138 | char *pif; | |
139 | ||
140 | if(af == AF_INET) | |
141 | { | |
142 | var = confgetvar("net", "visibleipv4"); | |
143 | if(var->val.ipv4.s_addr != 0) | |
144 | { | |
145 | ipv4 = smalloc(sizeof(*ipv4)); | |
146 | ipv4->sin_family = AF_INET; | |
147 | ipv4->sin_addr.s_addr = var->val.ipv4.s_addr; | |
148 | *addr = (struct sockaddr *)ipv4; | |
149 | *lenbuf = sizeof(*ipv4); | |
150 | return(0); | |
151 | } | |
bcb73bb3 | 152 | if((pif = icswcstombs(confgetstr("net", "publicif"), NULL, NULL)) == NULL) |
d3372da9 | 153 | { |
154 | flog(LOG_ERR, "could not convert net.publicif into local charset: %s", strerror(errno)); | |
155 | return(-1); | |
156 | } | |
6fb0c6ac | 157 | if(!strcmp(pif, "")) |
158 | return(1); | |
d3372da9 | 159 | if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
160 | return(-1); | |
161 | conf.ifc_buf = smalloc(conf.ifc_len = 65536); | |
162 | if(ioctl(sock, SIOCGIFCONF, &conf) < 0) | |
163 | { | |
164 | free(conf.ifc_buf); | |
165 | close(sock); | |
166 | return(-1); | |
167 | } | |
168 | bufend = ((char *)conf.ifc_buf) + conf.ifc_len; | |
169 | ipv4 = NULL; | |
170 | for(ifr = conf.ifc_ifcu.ifcu_req; (void *)ifr < bufend; ifr++) | |
171 | { | |
1315d02a | 172 | if(strcmp(ifr->ifr_name, pif)) |
6fb0c6ac | 173 | continue; |
d3372da9 | 174 | memset(&req, 0, sizeof(req)); |
175 | memcpy(req.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name)); | |
176 | if(ioctl(sock, SIOCGIFFLAGS, &req) < 0) | |
6fb0c6ac | 177 | break; |
178 | if(!(req.ifr_flags & IFF_UP)) | |
d3372da9 | 179 | { |
6fb0c6ac | 180 | flog(LOG_WARNING, "public interface is down"); |
181 | break; | |
d3372da9 | 182 | } |
6fb0c6ac | 183 | if(ifr->ifr_addr.sa_family != AF_INET) |
d3372da9 | 184 | { |
6fb0c6ac | 185 | flog(LOG_WARNING, "address of the public interface is not AF_INET"); |
186 | break; | |
d3372da9 | 187 | } |
6fb0c6ac | 188 | ipv4 = smalloc(sizeof(*ipv4)); |
189 | memcpy(ipv4, &ifr->ifr_addr, sizeof(ifr->ifr_addr)); | |
190 | break; | |
d3372da9 | 191 | } |
bcb73bb3 | 192 | free(conf.ifc_buf); |
d3372da9 | 193 | close(sock); |
194 | if(ipv4 != NULL) | |
195 | { | |
196 | *addr = (struct sockaddr *)ipv4; | |
197 | *lenbuf = sizeof(*ipv4); | |
198 | return(0); | |
199 | } | |
200 | errno = ENETDOWN; | |
201 | return(-1); | |
202 | } | |
6fb0c6ac | 203 | return(1); |
d3372da9 | 204 | } |
205 | ||
02a705ad | 206 | static struct socket *newsock1(int dgram) |
d3372da9 | 207 | { |
208 | struct socket *new; | |
209 | ||
02a705ad FT |
210 | new = memset(smalloc(sizeof(*new)), 0, sizeof(*new)); |
211 | new->refcount = 1; | |
d3372da9 | 212 | new->state = -1; |
02a705ad | 213 | new->dgram = dgram; |
81286a22 | 214 | new->maxbuf = 65536; |
d3372da9 | 215 | numsocks++; |
216 | return(new); | |
217 | } | |
218 | ||
02a705ad FT |
219 | static struct socket *sockpair(int dgram) |
220 | { | |
221 | struct socket *s1, *s2; | |
222 | ||
223 | s1 = newsock1(dgram); | |
224 | s2 = newsock1(dgram); | |
225 | s1->back = s2; | |
226 | s2->back = s1; | |
227 | putsock(s2); | |
228 | return(s1); | |
229 | } | |
230 | ||
231 | static void sksetstate(struct socket *sk, int state) | |
232 | { | |
233 | sk->state = state; | |
234 | sk->back->state = state; | |
235 | } | |
236 | ||
1ce5968e FT |
237 | struct socket *netsockpipe(void) |
238 | { | |
239 | struct socket *sk; | |
240 | ||
241 | sk = sockpair(0); | |
242 | sksetstate(sk, SOCK_EST); | |
243 | return(sk); | |
244 | } | |
245 | ||
02a705ad FT |
246 | static void closeufd(struct ufd *ufd) |
247 | { | |
248 | if(ufd->fd != -1) | |
249 | close(ufd->fd); | |
250 | ufd->fd = -1; | |
251 | } | |
252 | ||
253 | static void freeufd(struct ufd *ufd) | |
254 | { | |
255 | if(ufd->next != NULL) | |
256 | ufd->next->prev = ufd->prev; | |
257 | if(ufd->prev != NULL) | |
258 | ufd->prev->next = ufd->next; | |
259 | if(ufd == ufds) | |
260 | ufds = ufd->next; | |
261 | closeufd(ufd); | |
5afb0d14 FT |
262 | if(ufd->sk != NULL) |
263 | putsock(ufd->sk); | |
02a705ad FT |
264 | if(ufd->type == UFD_SOCK) { |
265 | if(ufd->d.s.remote != NULL) | |
266 | free(ufd->d.s.remote); | |
267 | } | |
268 | free(ufd); | |
269 | } | |
270 | ||
271 | static struct ufd *mkufd(int fd, int type, struct socket *sk) | |
272 | { | |
273 | struct ufd *ufd; | |
274 | ||
275 | ufd = memset(smalloc(sizeof(*ufd)), 0, sizeof(*ufd)); | |
276 | ufd->fd = fd; | |
5afb0d14 | 277 | ufd->type = type; |
02a705ad FT |
278 | if(sk != NULL) { |
279 | getsock(ufd->sk = sk); | |
280 | sk->ufd = ufd; | |
281 | } | |
282 | if(type == UFD_SOCK) { | |
283 | ufd->d.s.ucred.uid = -1; | |
284 | ufd->d.s.ucred.gid = -1; | |
285 | } | |
286 | ufd->next = ufds; | |
287 | if(ufds) | |
288 | ufds->prev = ufd; | |
289 | ufds = ufd; | |
290 | return(ufd); | |
291 | } | |
292 | ||
293 | static struct ufd *dupufd(struct ufd *ufd) | |
294 | { | |
295 | struct ufd *nufd; | |
296 | struct socket *nsk; | |
297 | ||
298 | if(ufd->sk != NULL) | |
299 | nsk = sockpair(ufd->sk->dgram); | |
300 | else | |
301 | nsk = NULL; | |
302 | nufd = mkufd(ufd->fd, ufd->type, nsk); | |
303 | if(nsk != NULL) | |
304 | putsock(nsk); | |
305 | if((nufd->fd = dup(ufd->fd)) < 0) | |
306 | { | |
307 | flog(LOG_WARNING, "could not dup() fd: %s", strerror(errno)); | |
308 | freeufd(nufd); | |
309 | return(NULL); | |
310 | } | |
5afb0d14 | 311 | sksetstate(nsk, SOCK_EST); |
02a705ad FT |
312 | if(ufd->type == UFD_SOCK) { |
313 | nufd->d.s.family = ufd->d.s.family; | |
314 | nufd->d.s.type = ufd->d.s.type; | |
315 | nufd->d.s.ucred.uid = ufd->d.s.ucred.uid; | |
316 | nufd->d.s.ucred.gid = ufd->d.s.ucred.gid; | |
317 | if(ufd->d.s.remote != NULL) | |
318 | nufd->d.s.remote = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, nufd->d.s.remotelen = ufd->d.s.remotelen); | |
319 | } else if(ufd->type == UFD_LISTEN) { | |
320 | nufd->d.l.family = ufd->d.l.family; | |
321 | } | |
322 | return(nufd); | |
323 | } | |
324 | ||
d3372da9 | 325 | static struct socket *mksock(int domain, int type) |
326 | { | |
327 | int fd; | |
02a705ad FT |
328 | struct socket *sk; |
329 | struct ufd *ufd; | |
d3372da9 | 330 | |
331 | if((fd = socket(domain, type, 0)) < 0) | |
332 | { | |
333 | flog(LOG_CRIT, "could not create socket: %s", strerror(errno)); | |
334 | return(NULL); | |
335 | } | |
02a705ad FT |
336 | sk = sockpair(type == SOCK_DGRAM); |
337 | ufd = mkufd(fd, UFD_SOCK, sk); | |
338 | ufd->d.s.family = domain; | |
339 | ufd->d.s.type = type; | |
d3372da9 | 340 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
02a705ad | 341 | return(sk); |
d3372da9 | 342 | } |
343 | ||
344 | struct socket *wrapsock(int fd) | |
345 | { | |
02a705ad FT |
346 | struct socket *sk; |
347 | struct ufd *ufd; | |
d3372da9 | 348 | |
02a705ad FT |
349 | sk = sockpair(0); |
350 | ufd = mkufd(fd, UFD_PIPE, sk->back); | |
351 | sksetstate(sk, SOCK_EST); | |
d3372da9 | 352 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
02a705ad | 353 | return(sk); |
d3372da9 | 354 | } |
355 | ||
356 | void getsock(struct socket *sk) | |
357 | { | |
358 | sk->refcount++; | |
359 | } | |
360 | ||
b2e73d7b FT |
361 | static void sockdebug(int level, struct socket *sk, char *format, ...) |
362 | { | |
363 | va_list args; | |
fc8e5171 | 364 | char *tb; |
b2e73d7b | 365 | |
fc8e5171 | 366 | if((sk->dbgnm == NULL) || (level > sk->dbglvl)) |
b2e73d7b FT |
367 | return; |
368 | va_start(args, format); | |
fc8e5171 | 369 | tb = vsprintf2(format, args); |
b2e73d7b | 370 | va_end(args); |
fc8e5171 FT |
371 | fprintf(stderr, "%s: %s\n", sk->dbgnm, tb); |
372 | free(tb); | |
b2e73d7b FT |
373 | } |
374 | ||
375 | void socksetdebug(struct socket *sk, int level, char *nm, ...) | |
376 | { | |
377 | va_list args; | |
378 | char *tb; | |
379 | ||
380 | va_start(args, nm); | |
381 | tb = vsprintf2(nm, args); | |
382 | va_end(args); | |
383 | sk->dbgnm = sprintf2("%s (f)", tb); | |
384 | sk->back->dbgnm = sprintf2("%s (b)", tb); | |
385 | free(tb); | |
386 | sk->dbglvl = level; | |
387 | sk->back->dbglvl = level; | |
fc8e5171 | 388 | sockdebug(1, sk, "enabled debugging"); |
b2e73d7b FT |
389 | } |
390 | ||
02a705ad | 391 | static void freesock(struct socket *sk) |
d3372da9 | 392 | { |
393 | struct dgrambuf *buf; | |
394 | ||
b2e73d7b | 395 | sockdebug(1, sk, "freeing socket"); |
02a705ad FT |
396 | if(sk->dgram) { |
397 | while((buf = sk->buf.d.f) != NULL) { | |
398 | sk->buf.d.f = buf->next; | |
399 | freedgbuf(buf); | |
d3372da9 | 400 | } |
02a705ad FT |
401 | } else { |
402 | if(sk->buf.s.buf != NULL) | |
403 | free(sk->buf.s.buf); | |
404 | } | |
b2e73d7b FT |
405 | if(sk->dbgnm != NULL) |
406 | free(sk->dbgnm); | |
02a705ad FT |
407 | free(sk); |
408 | numsocks--; | |
409 | } | |
410 | ||
411 | void putsock(struct socket *sk) | |
412 | { | |
7dddb551 FT |
413 | struct socket *back; |
414 | ||
02a705ad FT |
415 | if(--(sk->refcount) < 0) { |
416 | flog(LOG_CRIT, "BUG: socket refcount < 0"); | |
417 | abort(); | |
418 | } | |
419 | if((sk->refcount == 0) && (sk->back->refcount == 0)) { | |
7dddb551 | 420 | back = sk->back; |
02a705ad | 421 | freesock(sk); |
7dddb551 | 422 | freesock(back); |
02a705ad FT |
423 | } |
424 | } | |
425 | ||
1ff9e8ea FT |
426 | void quitsock(struct socket *sk) |
427 | { | |
428 | sk->readcb = NULL; | |
429 | sk->writecb = NULL; | |
430 | sk->errcb = NULL; | |
431 | putsock(sk); | |
432 | } | |
433 | ||
02a705ad FT |
434 | static void linksock(struct scons **list, struct socket *sk) |
435 | { | |
436 | struct scons *sc; | |
437 | ||
438 | for(sc = *list; sc != NULL; sc = sc->n) { | |
439 | if(sc->s == sk) | |
440 | return; | |
d3372da9 | 441 | } |
02a705ad FT |
442 | sc = smalloc(sizeof(*sc)); |
443 | getsock(sc->s = sk); | |
444 | sc->n = *list; | |
445 | sc->p = NULL; | |
446 | if(*list) | |
447 | (*list)->p = sc; | |
448 | *list = sc; | |
d3372da9 | 449 | } |
450 | ||
336539c2 | 451 | void sockpushdata(struct socket *sk, void *buf, size_t size) |
452 | { | |
02a705ad FT |
453 | if(size == 0) |
454 | return; | |
455 | if(sk->dgram) { | |
336539c2 | 456 | /* XXX */ |
02a705ad FT |
457 | } else { |
458 | sizebuf(&sk->buf.s.buf, &sk->buf.s.bufsize, sk->buf.s.datasize + size, 1, 1); | |
459 | memmove(sk->buf.s.buf + size, sk->buf.s.buf, sk->buf.s.datasize); | |
460 | memcpy(sk->buf.s.buf, buf, size); | |
461 | sk->buf.s.datasize += size; | |
462 | linksock(&rbatch, sk); | |
336539c2 | 463 | } |
02a705ad FT |
464 | } |
465 | ||
466 | /* Read as the preterite of `read' */ | |
467 | void sockread(struct socket *sk) | |
468 | { | |
5afb0d14 FT |
469 | if((sockgetdatalen(sk) == 0) && (sk->eos == 1)) |
470 | linksock(&rbatch, sk); | |
02a705ad FT |
471 | linksock(&wbatch, sk->back); |
472 | } | |
473 | ||
474 | void freedgbuf(struct dgrambuf *dg) | |
475 | { | |
476 | if(dg->data != NULL) | |
477 | free(dg->data); | |
478 | if(dg->addr != NULL) | |
479 | free(dg->addr); | |
480 | free(dg); | |
481 | } | |
482 | ||
483 | struct dgrambuf *sockgetdgbuf(struct socket *sk) | |
484 | { | |
485 | struct dgrambuf *dbuf; | |
486 | ||
487 | if((dbuf = sk->buf.d.f) == NULL) | |
488 | return(NULL); | |
489 | sk->buf.d.f = dbuf->next; | |
490 | if(dbuf->next == NULL) | |
491 | sk->buf.d.l = NULL; | |
492 | dbuf->next = NULL; | |
493 | sockread(sk); | |
494 | return(dbuf); | |
336539c2 | 495 | } |
496 | ||
d3372da9 | 497 | void *sockgetinbuf(struct socket *sk, size_t *size) |
498 | { | |
499 | void *buf; | |
500 | struct dgrambuf *dbuf; | |
501 | ||
02a705ad FT |
502 | if(sk->dgram) { |
503 | dbuf = sockgetdgbuf(sk); | |
d3372da9 | 504 | buf = dbuf->data; |
505 | *size = dbuf->size; | |
506 | free(dbuf->addr); | |
507 | free(dbuf); | |
02a705ad FT |
508 | } else { |
509 | if((sk->buf.s.buf == NULL) || (sk->buf.s.datasize == 0)) | |
510 | { | |
511 | *size = 0; | |
b2e73d7b | 512 | sockdebug(2, sk, "read 0 bytes", *size); |
02a705ad FT |
513 | return(NULL); |
514 | } | |
515 | buf = sk->buf.s.buf; | |
516 | *size = sk->buf.s.datasize; | |
517 | sk->buf.s.buf = NULL; | |
518 | sk->buf.s.bufsize = sk->buf.s.datasize = 0; | |
519 | sockread(sk); | |
d3372da9 | 520 | } |
fc8e5171 | 521 | sockdebug(2, sk, "read %zi bytes", *size); |
02a705ad FT |
522 | return(buf); |
523 | } | |
524 | ||
525 | void sockqueue(struct socket *sk, void *data, size_t size) | |
526 | { | |
527 | struct dgrambuf *new; | |
528 | struct sockaddr *remote; | |
529 | socklen_t remotelen; | |
530 | ||
fc8e5171 | 531 | sockdebug(2, sk, "queued %zi bytes", size); |
02a705ad FT |
532 | if(size == 0) |
533 | return; | |
534 | if(sk->state == SOCK_STL) | |
535 | return; | |
536 | if(sk->dgram) { | |
537 | if(sockpeeraddr(sk, &remote, &remotelen)) | |
538 | return; | |
539 | new = smalloc(sizeof(*new)); | |
540 | new->next = NULL; | |
541 | memcpy(new->data = smalloc(size), data, new->size = size); | |
542 | new->addr = remote; | |
543 | new->addrlen = remotelen; | |
544 | if(sk->back->buf.d.l == NULL) | |
545 | { | |
546 | sk->back->buf.d.l = sk->back->buf.d.f = new; | |
547 | } else { | |
548 | sk->back->buf.d.l->next = new; | |
549 | sk->back->buf.d.l = new; | |
550 | } | |
551 | } else { | |
552 | sizebuf(&(sk->back->buf.s.buf), &(sk->back->buf.s.bufsize), sk->back->buf.s.datasize + size, 1, 1); | |
553 | memcpy(sk->back->buf.s.buf + sk->back->buf.s.datasize, data, size); | |
554 | sk->back->buf.s.datasize += size; | |
555 | } | |
556 | linksock(&rbatch, sk->back); | |
557 | } | |
558 | ||
559 | void sockqueuedg(struct socket *sk, struct dgrambuf *dg) | |
560 | { | |
561 | if(sk->state == SOCK_STL) { | |
562 | freedgbuf(dg); | |
563 | return; | |
564 | } | |
565 | if(!sk->dgram) { | |
566 | flog(LOG_ERR, "BUG: sockqueuedg called on non-dgram socket"); | |
567 | freedgbuf(dg); | |
568 | return; | |
569 | } | |
570 | dg->next = NULL; | |
571 | if(sk->back->buf.d.l == NULL) | |
572 | { | |
573 | sk->back->buf.d.l = sk->back->buf.d.f = dg; | |
574 | } else { | |
575 | sk->back->buf.d.l->next = dg; | |
576 | sk->back->buf.d.l = dg; | |
577 | } | |
578 | linksock(&rbatch, sk->back); | |
579 | } | |
580 | ||
40c21c4f | 581 | void sockerror(struct socket *sk, int en) |
02a705ad FT |
582 | { |
583 | sksetstate(sk, SOCK_STL); | |
584 | if(sk->back->errcb != NULL) | |
585 | sk->back->errcb(sk->back, en, sk->back->data); | |
d3372da9 | 586 | } |
587 | ||
02a705ad | 588 | static void recvcmsg(struct ufd *ufd, struct msghdr *msg) |
9e5f2b29 | 589 | { |
590 | struct cmsghdr *cmsg; | |
9e5f2b29 | 591 | |
592 | for(cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) | |
593 | { | |
a8c5ada6 | 594 | #if UNIX_AUTH_STYLE == 1 |
9e5f2b29 | 595 | if((cmsg->cmsg_level == SOL_SOCKET) && (cmsg->cmsg_type == SCM_CREDENTIALS)) |
596 | { | |
a8c5ada6 | 597 | struct ucred *cred; |
02a705ad | 598 | if(ufd->d.s.ucred.uid == -1) |
9e5f2b29 | 599 | { |
600 | cred = (struct ucred *)CMSG_DATA(cmsg); | |
02a705ad FT |
601 | ufd->d.s.ucred.uid = cred->uid; |
602 | ufd->d.s.ucred.gid = cred->gid; | |
9e5f2b29 | 603 | } |
604 | } | |
a8c5ada6 | 605 | #endif |
9e5f2b29 | 606 | } |
607 | } | |
608 | ||
02a705ad FT |
609 | static int ufddgram(struct ufd *ufd) |
610 | { | |
611 | int dgram; | |
612 | ||
613 | if(ufd->type == UFD_SOCK) { | |
614 | dgram = ufd->d.s.type == SOCK_DGRAM; | |
615 | } else if(ufd->type == UFD_PIPE) { | |
616 | dgram = 0; | |
617 | } else { | |
618 | flog(LOG_ERR, "BUG: calling ufddgram on ufd of bad type %i", ufd->type); | |
619 | return(-1); | |
620 | } | |
621 | if(ufd->sk == NULL) { | |
622 | flog(LOG_ERR, "BUG: calling ufddgram on socketless ufd (type %i)", ufd->type); | |
623 | return(-1); | |
624 | } | |
625 | if(dgram != ufd->sk->dgram) { | |
626 | flog(LOG_ERR, "BUG: ufd/socket dgram value mismatch"); | |
627 | return(-1); | |
628 | } | |
629 | return(dgram); | |
630 | } | |
631 | ||
632 | static void sockrecv(struct ufd *ufd) | |
d3372da9 | 633 | { |
634 | int ret, inq; | |
02a705ad | 635 | int dgram; |
d3372da9 | 636 | struct dgrambuf *dbuf; |
9e5f2b29 | 637 | struct msghdr msg; |
638 | char cbuf[65536]; | |
639 | struct iovec bufvec; | |
02a705ad | 640 | void *buf; |
d3372da9 | 641 | |
9e5f2b29 | 642 | memset(&msg, 0, sizeof(msg)); |
643 | msg.msg_iov = &bufvec; | |
644 | msg.msg_iovlen = 1; | |
645 | msg.msg_control = cbuf; | |
646 | msg.msg_controllen = sizeof(cbuf); | |
02a705ad FT |
647 | if((dgram = ufddgram(ufd)) < 0) |
648 | return; | |
649 | if(dgram) { | |
9e5f2b29 | 650 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) |
02a705ad | 651 | if(ioctl(ufd->fd, SIOCINQ, &inq)) |
d3372da9 | 652 | { |
653 | /* I don't really know what could go wrong here, so let's | |
654 | * assume it's transient. */ | |
02a705ad | 655 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i", strerror(errno), ufd->fd); |
d3372da9 | 656 | return; |
657 | } | |
9e5f2b29 | 658 | #else |
659 | inq = 65536; | |
660 | #endif | |
d3372da9 | 661 | dbuf = smalloc(sizeof(*dbuf)); |
662 | dbuf->data = smalloc(inq); | |
663 | dbuf->addr = smalloc(dbuf->addrlen = sizeof(struct sockaddr_storage)); | |
9e5f2b29 | 664 | msg.msg_name = dbuf->addr; |
665 | msg.msg_namelen = dbuf->addrlen; | |
666 | bufvec.iov_base = dbuf->data; | |
667 | bufvec.iov_len = inq; | |
02a705ad | 668 | ret = recvmsg(ufd->fd, &msg, 0); |
9e5f2b29 | 669 | dbuf->addrlen = msg.msg_namelen; |
d3372da9 | 670 | if(ret < 0) |
671 | { | |
02a705ad | 672 | freedgbuf(dbuf); |
d3372da9 | 673 | if((errno == EINTR) || (errno == EAGAIN)) |
674 | return; | |
02a705ad FT |
675 | closeufd(ufd); |
676 | sockerror(ufd->sk, errno); | |
d3372da9 | 677 | return; |
678 | } | |
9e5f2b29 | 679 | if(msg.msg_flags & MSG_CTRUNC) |
680 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
681 | else | |
02a705ad | 682 | recvcmsg(ufd, &msg); |
d3372da9 | 683 | /* On UDP/IPv[46], ret == 0 doesn't mean EOF (since UDP can't |
684 | * have EOF), but rather an empty packet. I don't know if any | |
685 | * other potential DGRAM protocols might have an EOF | |
686 | * condition, so let's play safe. */ | |
687 | if(ret == 0) | |
688 | { | |
02a705ad FT |
689 | freedgbuf(dbuf); |
690 | if((ufd->type != UFD_SOCK) || !((ufd->d.s.family == AF_INET) || (ufd->d.s.family == AF_INET6))) | |
d3372da9 | 691 | { |
40c21c4f | 692 | closesock(ufd->sk); |
02a705ad | 693 | closeufd(ufd); |
d3372da9 | 694 | } |
695 | return; | |
696 | } | |
697 | dbuf->addr = srealloc(dbuf->addr, dbuf->addrlen); | |
698 | dbuf->data = srealloc(dbuf->data, dbuf->size = ret); | |
699 | dbuf->next = NULL; | |
02a705ad FT |
700 | sockqueuedg(ufd->sk, dbuf); |
701 | } else { | |
702 | #if defined(HAVE_LINUX_SOCKIOS_H) && defined(SIOCINQ) | |
703 | /* SIOCINQ is Linux-specific AFAIK, but I really have no idea | |
704 | * how to read the inqueue size on other OSs */ | |
705 | if(ufd->type == UFD_SOCK) { | |
706 | if(ioctl(ufd->fd, SIOCINQ, &inq)) | |
707 | { | |
708 | /* I don't really know what could go wrong here, so let's | |
709 | * assume it's transient. */ | |
710 | flog(LOG_WARNING, "SIOCINQ return %s on socket %i, falling back to 2048 bytes", strerror(errno), ufd->fd); | |
711 | inq = 2048; | |
712 | } | |
713 | } else { | |
714 | /* There are perils when trying to use SIOCINQ on files >2GiB... */ | |
715 | inq = 65536; | |
716 | } | |
717 | #else | |
718 | inq = 2048; | |
719 | #endif | |
720 | if(inq > 65536) | |
721 | inq = 65536; | |
722 | /* This part could be optimized by telling the kernel to read | |
723 | * directly into ufd->sk->back->buf, but that would be uglier | |
724 | * by not using the socket function interface. */ | |
725 | buf = smalloc(inq); | |
726 | if(ufd->type == UFD_SOCK) | |
727 | { | |
728 | bufvec.iov_base = buf; | |
729 | bufvec.iov_len = inq; | |
730 | ret = recvmsg(ufd->fd, &msg, 0); | |
731 | } else { | |
732 | ret = read(ufd->fd, buf, inq); | |
733 | msg.msg_controllen = 0; | |
734 | msg.msg_flags = 0; | |
735 | } | |
736 | if(ret < 0) | |
737 | { | |
738 | free(buf); | |
739 | if((errno == EINTR) || (errno == EAGAIN)) | |
740 | return; | |
741 | closeufd(ufd); | |
742 | sockerror(ufd->sk, errno); | |
743 | return; | |
744 | } | |
745 | if(msg.msg_flags & MSG_CTRUNC) | |
746 | flog(LOG_DEBUG, "ancillary data was truncated"); | |
d3372da9 | 747 | else |
02a705ad FT |
748 | recvcmsg(ufd, &msg); |
749 | if(ret == 0) | |
750 | { | |
751 | free(buf); | |
752 | closeufd(ufd); | |
40c21c4f | 753 | closesock(ufd->sk); |
02a705ad FT |
754 | return; |
755 | } | |
756 | sockqueue(ufd->sk, buf, ret); | |
757 | free(buf); | |
d3372da9 | 758 | } |
759 | } | |
760 | ||
89d650f1 | 761 | static int sockflush(struct ufd *ufd) |
d3372da9 | 762 | { |
763 | int ret; | |
764 | struct dgrambuf *dbuf; | |
02a705ad | 765 | int dgram; |
d3372da9 | 766 | |
89d650f1 FT |
767 | if((dgram = ufddgram(ufd)) < 0) { |
768 | errno = EBADFD; | |
769 | return(-1); | |
770 | } | |
02a705ad FT |
771 | if(dgram) { |
772 | dbuf = sockgetdgbuf(ufd->sk); | |
773 | sendto(ufd->fd, dbuf->data, dbuf->size, MSG_DONTWAIT | MSG_NOSIGNAL, dbuf->addr, dbuf->addrlen); | |
774 | freedgbuf(dbuf); | |
775 | } else { | |
776 | if(ufd->type == UFD_SOCK) | |
777 | ret = send(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize, MSG_DONTWAIT | MSG_NOSIGNAL); | |
d3372da9 | 778 | else |
02a705ad | 779 | ret = write(ufd->fd, ufd->sk->buf.s.buf, ufd->sk->buf.s.datasize); |
89d650f1 FT |
780 | if(ret < 0) |
781 | return(-1); | |
02a705ad FT |
782 | if(ret > 0) { |
783 | memmove(ufd->sk->buf.s.buf, ((char *)ufd->sk->buf.s.buf) + ret, ufd->sk->buf.s.datasize -= ret); | |
784 | sockread(ufd->sk); | |
d3372da9 | 785 | } |
d3372da9 | 786 | } |
89d650f1 | 787 | return(0); |
d3372da9 | 788 | } |
789 | ||
790 | void closesock(struct socket *sk) | |
791 | { | |
b2e73d7b | 792 | sockdebug(1, sk, "closed"); |
02a705ad | 793 | sksetstate(sk, SOCK_STL); |
40c21c4f FT |
794 | if(sk->back->eos == 0) |
795 | sk->back->eos = 1; | |
796 | linksock(&rbatch, sk->back); | |
d3372da9 | 797 | } |
798 | ||
799 | size_t sockgetdatalen(struct socket *sk) | |
800 | { | |
801 | struct dgrambuf *b; | |
802 | size_t ret; | |
803 | ||
02a705ad | 804 | if(sk->dgram) { |
d3372da9 | 805 | ret = 0; |
02a705ad | 806 | for(b = sk->buf.d.f; b != NULL; b = b->next) |
d3372da9 | 807 | ret += b->size; |
02a705ad FT |
808 | } else { |
809 | ret = sk->buf.s.datasize; | |
d3372da9 | 810 | } |
811 | return(ret); | |
812 | } | |
813 | ||
81286a22 FT |
814 | /* size_t sockqueuesize(struct socket *sk) */ |
815 | /* { */ | |
816 | /* return(sockgetdatalen(sk->back)); */ | |
817 | /* } */ | |
818 | ||
1ff9e8ea FT |
819 | size_t socktqueuesize(struct socket *sk) |
820 | { | |
821 | size_t ret; | |
822 | ||
823 | ret = 0; | |
824 | while(1) { | |
825 | ret += sockgetdatalen(sk->back); | |
826 | if((sk = sk->back->pnext) == NULL) | |
827 | return(ret); | |
828 | } | |
829 | } | |
830 | ||
81286a22 | 831 | ssize_t sockqueueleft(struct socket *sk) |
d3372da9 | 832 | { |
81286a22 | 833 | return(sk->back->maxbuf - sockgetdatalen(sk->back)); |
d3372da9 | 834 | } |
835 | ||
d3372da9 | 836 | /* |
7ab36fbd | 837 | * Seriously, I don't know if it's naughty or not to remove |
838 | * pre-existing Unix sockets. | |
839 | */ | |
02a705ad | 840 | static int rebindunix(struct ufd *ufd, struct sockaddr *name, socklen_t namelen) |
7ab36fbd | 841 | { |
842 | struct sockaddr_un *un; | |
843 | struct stat sb; | |
844 | ||
02a705ad | 845 | if((ufd->d.l.family != AF_UNIX) || (name->sa_family != PF_UNIX)) |
7ab36fbd | 846 | return(-1); |
847 | un = (struct sockaddr_un *)name; | |
848 | if(stat(un->sun_path, &sb)) | |
849 | return(-1); | |
850 | if(!S_ISSOCK(sb.st_mode)) | |
851 | return(-1); | |
852 | if(unlink(un->sun_path)) | |
853 | return(-1); | |
02a705ad | 854 | if(bind(ufd->fd, name, namelen) < 0) |
7ab36fbd | 855 | return(-1); |
856 | return(0); | |
857 | } | |
858 | ||
f96d0914 FT |
859 | void closelport(struct lport *lp) |
860 | { | |
40c21c4f FT |
861 | struct ufd *ufd; |
862 | struct sockaddr_un *un; | |
863 | ||
864 | ufd = lp->ufd; | |
865 | if((ufd->d.l.family == AF_UNIX) && !getlocalname(ufd->fd, (struct sockaddr **)(void *)&un, NULL) && (un->sun_family == PF_UNIX) && strchr(un->sun_path, '/')) { | |
866 | if(unlink(un->sun_path)) | |
867 | flog(LOG_WARNING, "could not unlink Unix socket %s: %s", un->sun_path, strerror(errno)); | |
868 | } | |
f96d0914 FT |
869 | freeufd(lp->ufd); |
870 | } | |
871 | ||
7ab36fbd | 872 | /* |
d3372da9 | 873 | * The difference between netcslisten() and netcslistenlocal() is that |
874 | * netcslistenlocal() always listens on the local host, instead of | |
875 | * following proxy/passive mode directions. It is suitable for eg. the | |
876 | * UI channel, while the file sharing networks should, naturally, use | |
877 | * netcslisten() instead. | |
878 | */ | |
879 | ||
02a705ad | 880 | struct lport *netcslistenlocal(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
d3372da9 | 881 | { |
02a705ad FT |
882 | struct lport *lp; |
883 | struct ufd *ufd; | |
884 | int fd; | |
66c517d2 | 885 | int intbuf; |
d3372da9 | 886 | |
887 | /* I don't know if this is actually correct (it probably isn't), | |
888 | * but since, at on least Linux systems, PF_* are specifically | |
889 | * #define'd to their AF_* counterparts, it allows for a severely | |
890 | * smoother implementation. If it breaks something on your | |
891 | * platform, please tell me so. | |
892 | */ | |
02a705ad | 893 | if((fd = socket(name->sa_family, type, 0)) < 0) |
d3372da9 | 894 | return(NULL); |
02a705ad | 895 | if(confgetint("net", "reuseaddr")) { |
687b2ee2 | 896 | intbuf = 1; |
02a705ad | 897 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &intbuf, sizeof(intbuf)); |
687b2ee2 | 898 | } |
02a705ad | 899 | ufd = mkufd(fd, UFD_LISTEN, NULL); |
02a705ad | 900 | ufd->d.l.family = name->sa_family; |
f96d0914 FT |
901 | lp = memset(smalloc(sizeof(*lp)), 0, sizeof(*lp)); |
902 | lp->ufd = ufd; | |
903 | ufd->d.l.lp = lp; | |
02a705ad FT |
904 | if((bind(fd, name, namelen) < 0) && ((errno != EADDRINUSE) || (rebindunix(ufd, name, namelen) < 0))) { |
905 | freeufd(ufd); | |
d3372da9 | 906 | return(NULL); |
907 | } | |
02a705ad | 908 | if(listen(fd, 16) < 0) |
d3372da9 | 909 | { |
02a705ad | 910 | freeufd(ufd); |
d3372da9 | 911 | return(NULL); |
912 | } | |
02a705ad FT |
913 | lp->acceptcb = func; |
914 | lp->data = data; | |
915 | return(lp); | |
d3372da9 | 916 | } |
917 | ||
02a705ad | 918 | struct lport *netcslisten(int type, struct sockaddr *name, socklen_t namelen, void (*func)(struct lport *, struct socket *, void *), void *data) |
c23acc61 | 919 | { |
920 | if(confgetint("net", "mode") == 1) | |
921 | { | |
922 | errno = EOPNOTSUPP; | |
923 | return(NULL); | |
924 | } | |
c23acc61 | 925 | if(confgetint("net", "mode") == 0) |
926 | return(netcslistenlocal(type, name, namelen, func, data)); | |
927 | errno = EOPNOTSUPP; | |
928 | return(NULL); | |
929 | } | |
930 | ||
02a705ad | 931 | struct lport *netcstcplisten(int port, int local, void (*func)(struct lport *, struct socket *, void *), void *data) |
0a1bc5b1 | 932 | { |
933 | struct sockaddr_in addr; | |
934 | #ifdef HAVE_IPV6 | |
935 | struct sockaddr_in6 addr6; | |
936 | #endif | |
02a705ad FT |
937 | struct lport *(*csfunc)(int, struct sockaddr *, socklen_t, void (*)(struct lport *, struct socket *, void *), void *); |
938 | struct lport *ret; | |
0a1bc5b1 | 939 | |
940 | if(local) | |
941 | csfunc = netcslistenlocal; | |
942 | else | |
943 | csfunc = netcslisten; | |
944 | #ifdef HAVE_IPV6 | |
945 | memset(&addr6, 0, sizeof(addr6)); | |
946 | addr6.sin6_family = AF_INET6; | |
947 | addr6.sin6_port = htons(port); | |
948 | addr6.sin6_addr = in6addr_any; | |
949 | if((ret = csfunc(SOCK_STREAM, (struct sockaddr *)&addr6, sizeof(addr6), func, data)) != NULL) | |
950 | return(ret); | |
951 | if((ret == NULL) && (errno != EAFNOSUPPORT)) | |
952 | return(NULL); | |
953 | #endif | |
954 | memset(&addr, 0, sizeof(addr)); | |
955 | addr.sin_family = AF_INET; | |
956 | addr.sin_port = htons(port); | |
957 | return(csfunc(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), func, data)); | |
958 | } | |
959 | ||
d3372da9 | 960 | struct socket *netcsdgram(struct sockaddr *name, socklen_t namelen) |
961 | { | |
962 | struct socket *sk; | |
963 | int mode; | |
964 | ||
965 | mode = confgetint("net", "mode"); | |
966 | if((mode == 0) || (mode == 1)) | |
967 | { | |
968 | if((sk = mksock(name->sa_family, SOCK_DGRAM)) == NULL) | |
969 | return(NULL); | |
02a705ad | 970 | if(bind(sk->ufd->fd, name, namelen) < 0) |
d3372da9 | 971 | { |
972 | putsock(sk); | |
973 | return(NULL); | |
974 | } | |
02a705ad FT |
975 | sksetstate(sk, SOCK_EST); |
976 | return(sk->back); | |
d3372da9 | 977 | } |
978 | errno = EOPNOTSUPP; | |
979 | return(NULL); | |
980 | } | |
981 | ||
02a705ad | 982 | struct socket *netdgramconn(struct socket *sk, struct sockaddr *addr, socklen_t addrlen) |
d3372da9 | 983 | { |
02a705ad | 984 | struct ufd *nufd; |
d3372da9 | 985 | |
02a705ad | 986 | nufd = dupufd(sk->back->ufd); |
5afb0d14 | 987 | getsock(sk = nufd->sk->back); |
02a705ad FT |
988 | memcpy(nufd->d.s.remote = smalloc(addrlen), addr, nufd->d.s.remotelen = addrlen); |
989 | nufd->ignread = 1; | |
990 | return(sk); | |
d3372da9 | 991 | } |
992 | ||
cab0b442 | 993 | struct socket *netcsconn(struct sockaddr *addr, socklen_t addrlen, void (*func)(struct socket *, int, void *), void *data) |
d3372da9 | 994 | { |
995 | struct socket *sk; | |
996 | int mode; | |
997 | ||
998 | mode = confgetint("net", "mode"); | |
999 | if((mode == 0) || (mode == 1)) | |
1000 | { | |
1001 | if((sk = mksock(addr->sa_family, SOCK_STREAM)) == NULL) | |
1002 | return(NULL); | |
02a705ad FT |
1003 | memcpy(sk->ufd->d.s.remote = smalloc(addrlen), addr, sk->ufd->d.s.remotelen = addrlen); |
1004 | sk->back->conncb = func; | |
1005 | sk->back->data = data; | |
1006 | if(!connect(sk->ufd->fd, addr, addrlen)) | |
d3372da9 | 1007 | { |
02a705ad FT |
1008 | sksetstate(sk, SOCK_EST); |
1009 | linksock(&cbatch, sk->back); | |
1010 | return(sk->back); | |
d3372da9 | 1011 | } |
1012 | if(errno == EINPROGRESS) | |
1013 | { | |
02a705ad FT |
1014 | sksetstate(sk, SOCK_SYN); |
1015 | return(sk->back); | |
d3372da9 | 1016 | } |
1017 | putsock(sk); | |
1018 | return(NULL); | |
1019 | } | |
1020 | errno = EOPNOTSUPP; | |
1021 | return(NULL); | |
1022 | } | |
1023 | ||
02a705ad | 1024 | static void acceptunix(struct ufd *ufd) |
9e5f2b29 | 1025 | { |
1026 | int buf; | |
1027 | ||
1028 | buf = 1; | |
a8c5ada6 | 1029 | #if UNIX_AUTH_STYLE == 1 |
02a705ad FT |
1030 | if(setsockopt(ufd->fd, SOL_SOCKET, SO_PASSCRED, &buf, sizeof(buf)) < 0) |
1031 | flog(LOG_WARNING, "could not enable SO_PASSCRED on Unix socket %i: %s", ufd->fd, strerror(errno)); | |
a8c5ada6 | 1032 | #elif UNIX_AUTH_STYLE == 2 |
02a705ad | 1033 | if(getpeereid(ufd->fd, &ufd->d.s.ucred.uid, &ufd->d.s.ucred.gid) < 0) |
a8c5ada6 | 1034 | { |
02a705ad FT |
1035 | flog(LOG_WARNING, "could not get peer creds on Unix socket %i: %s", ufd->fd, strerror(errno)); |
1036 | ufd->d.s.ucred.uid = -1; | |
1037 | ufd->d.s.ucred.gid = -1; | |
a8c5ada6 | 1038 | } |
1039 | #endif | |
9e5f2b29 | 1040 | } |
1041 | ||
f96d0914 FT |
1042 | static void runbatches(void) |
1043 | { | |
1044 | struct scons *sc, *nsc; | |
1045 | ||
1046 | for(sc = cbatch, cbatch = NULL; sc; sc = nsc) { | |
1047 | nsc = sc->n; | |
5afb0d14 FT |
1048 | if(sc->s->conncb != NULL) |
1049 | sc->s->conncb(sc->s, 0, sc->s->data); | |
834b0aa6 | 1050 | putsock(sc->s); |
f96d0914 FT |
1051 | free(sc); |
1052 | } | |
1053 | for(sc = rbatch, rbatch = NULL; sc; sc = nsc) { | |
1054 | nsc = sc->n; | |
5afb0d14 FT |
1055 | if(sc->s->readcb != NULL) |
1056 | sc->s->readcb(sc->s, sc->s->data); | |
1057 | if((sockgetdatalen(sc->s) == 0) && (sc->s->eos == 1)) { | |
1058 | if(sc->s->errcb != NULL) | |
1059 | sc->s->errcb(sc->s, 0, sc->s->data); | |
1060 | sc->s->eos = 2; | |
1061 | } | |
834b0aa6 | 1062 | putsock(sc->s); |
f96d0914 FT |
1063 | free(sc); |
1064 | } | |
1065 | for(sc = wbatch, wbatch = NULL; sc; sc = nsc) { | |
1066 | nsc = sc->n; | |
5afb0d14 FT |
1067 | if(sc->s->writecb != NULL) |
1068 | sc->s->writecb(sc->s, sc->s->data); | |
834b0aa6 | 1069 | putsock(sc->s); |
f96d0914 FT |
1070 | free(sc); |
1071 | } | |
1072 | } | |
1073 | ||
5afb0d14 FT |
1074 | static void cleansocks(void) |
1075 | { | |
1076 | struct ufd *ufd, *next; | |
1077 | ||
1078 | for(ufd = ufds; ufd != NULL; ufd = next) { | |
1079 | next = ufd->next; | |
834b0aa6 | 1080 | if(ufd->sk && ((ufd->fd < 0) || (sockgetdatalen(ufd->sk) == 0))) { |
5afb0d14 FT |
1081 | if(ufd->sk->eos == 1) { |
1082 | ufd->sk->eos = 2; | |
1083 | closeufd(ufd); | |
1084 | closesock(ufd->sk); | |
1085 | } | |
1086 | if((ufd->sk->refcount == 1) && (ufd->sk->back->refcount == 0)) { | |
1087 | freeufd(ufd); | |
1088 | continue; | |
1089 | } | |
1090 | } | |
1091 | } | |
1092 | } | |
1093 | ||
d3372da9 | 1094 | int pollsocks(int timeout) |
1095 | { | |
02a705ad | 1096 | int ret; |
eaa35963 | 1097 | socklen_t retlen; |
72a7835e FT |
1098 | int newfd, maxfd; |
1099 | fd_set rfds, wfds, efds; | |
5afb0d14 | 1100 | struct ufd *ufd, *nufd; |
02a705ad | 1101 | struct socket *nsk; |
d3372da9 | 1102 | struct sockaddr_storage ss; |
1103 | socklen_t sslen; | |
72a7835e | 1104 | struct timeval tv; |
d3372da9 | 1105 | |
5afb0d14 | 1106 | cleansocks(); |
72a7835e FT |
1107 | FD_ZERO(&rfds); |
1108 | FD_ZERO(&wfds); | |
1109 | FD_ZERO(&efds); | |
02a705ad FT |
1110 | for(maxfd = 0, ufd = ufds; ufd != NULL; ufd = ufd->next) { |
1111 | if(ufd->fd < 0) | |
d3372da9 | 1112 | continue; |
81286a22 | 1113 | if(!ufd->ignread && ((ufd->sk == NULL) || (sockqueueleft(ufd->sk) > 0))) |
02a705ad FT |
1114 | FD_SET(ufd->fd, &rfds); |
1115 | if(ufd->sk != NULL) { | |
1116 | if(sockgetdatalen(ufd->sk) > 0) | |
1117 | FD_SET(ufd->fd, &wfds); | |
1118 | else if(ufd->sk->state == SOCK_SYN) | |
1119 | FD_SET(ufd->fd, &wfds); | |
1120 | } | |
1121 | FD_SET(ufd->fd, &efds); | |
1122 | if(ufd->fd > maxfd) | |
1123 | maxfd = ufd->fd; | |
d3372da9 | 1124 | } |
5afb0d14 FT |
1125 | if(rbatch || wbatch || cbatch) |
1126 | timeout = 0; | |
72a7835e FT |
1127 | tv.tv_sec = timeout / 1000; |
1128 | tv.tv_usec = (timeout % 1000) * 1000; | |
1129 | ret = select(maxfd + 1, &rfds, &wfds, &efds, (timeout < 0)?NULL:&tv); | |
02a705ad FT |
1130 | if(ret < 0) { |
1131 | if(errno != EINTR) { | |
72a7835e | 1132 | flog(LOG_CRIT, "pollsocks: select errored out: %s", strerror(errno)); |
d3372da9 | 1133 | /* To avoid CPU hogging in case it's bad, which it |
1134 | * probably is. */ | |
1135 | sleep(1); | |
1136 | } | |
d3372da9 | 1137 | return(1); |
1138 | } | |
5afb0d14 | 1139 | for(ufd = ufds; ufd != NULL; ufd = ufd->next) { |
02a705ad FT |
1140 | if(ufd->sk < 0) |
1141 | continue; | |
1142 | if(ufd->type == UFD_LISTEN) { | |
1143 | if(FD_ISSET(ufd->fd, &rfds)) { | |
d3372da9 | 1144 | sslen = sizeof(ss); |
02a705ad FT |
1145 | if((newfd = accept(ufd->fd, (struct sockaddr *)&ss, &sslen)) < 0) { |
1146 | if(ufd->d.l.lp->errcb != NULL) | |
1147 | ufd->d.l.lp->errcb(ufd->d.l.lp, errno, ufd->d.l.lp->data); | |
cab0b442 | 1148 | } |
02a705ad FT |
1149 | nsk = sockpair(0); |
1150 | nufd = mkufd(newfd, UFD_SOCK, nsk); | |
1151 | nufd->d.s.family = ufd->d.l.family; | |
1152 | sksetstate(nsk, SOCK_EST); | |
1153 | memcpy(nufd->d.s.remote = smalloc(sslen), &ss, sslen); | |
1154 | nufd->d.s.remotelen = sslen; | |
9e5f2b29 | 1155 | if(ss.ss_family == PF_UNIX) |
02a705ad FT |
1156 | acceptunix(nufd); |
1157 | if(ufd->d.l.lp->acceptcb != NULL) | |
5afb0d14 | 1158 | ufd->d.l.lp->acceptcb(ufd->d.l.lp, nsk->back, ufd->d.l.lp->data); |
02a705ad | 1159 | putsock(nsk); |
d3372da9 | 1160 | } |
02a705ad | 1161 | if(FD_ISSET(ufd->fd, &efds)) { |
d3372da9 | 1162 | retlen = sizeof(ret); |
02a705ad FT |
1163 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); |
1164 | if(ufd->d.l.lp->errcb != NULL) | |
1165 | ufd->d.l.lp->errcb(ufd->d.l.lp, ret, ufd->d.l.lp->data); | |
d3372da9 | 1166 | continue; |
1167 | } | |
02a705ad FT |
1168 | } else { |
1169 | if(ufd->sk->state == SOCK_SYN) { | |
1170 | if(FD_ISSET(ufd->fd, &efds)) { | |
1171 | retlen = sizeof(ret); | |
1172 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); | |
1173 | if(ufd->sk->back->conncb != NULL) | |
1174 | ufd->sk->back->conncb(ufd->sk->back, ret, ufd->sk->back->data); | |
1175 | closeufd(ufd); | |
1176 | continue; | |
1177 | } | |
1178 | if(FD_ISSET(ufd->fd, &rfds) || FD_ISSET(ufd->fd, &wfds)) { | |
1179 | sksetstate(ufd->sk, SOCK_EST); | |
1180 | linksock(&cbatch, ufd->sk->back); | |
1181 | } | |
1182 | } else if(ufd->sk->state == SOCK_EST) { | |
1183 | if(FD_ISSET(ufd->fd, &efds)) { | |
1184 | retlen = sizeof(ret); | |
1185 | getsockopt(ufd->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen); | |
1186 | sockerror(ufd->sk, ret); | |
1187 | closeufd(ufd); | |
1188 | continue; | |
1189 | } | |
1190 | if(FD_ISSET(ufd->fd, &rfds)) | |
1191 | sockrecv(ufd); | |
5afb0d14 FT |
1192 | if(ufd->fd == -1) |
1193 | continue; | |
89d650f1 FT |
1194 | if(FD_ISSET(ufd->fd, &wfds)) { |
1195 | if(sockflush(ufd)) { | |
1196 | sockerror(ufd->sk, errno); | |
1197 | closeufd(ufd); | |
1198 | continue; | |
1199 | } | |
1200 | } | |
d3372da9 | 1201 | } |
d3372da9 | 1202 | } |
d3372da9 | 1203 | } |
f96d0914 | 1204 | runbatches(); |
5afb0d14 | 1205 | cleansocks(); |
d3372da9 | 1206 | return(1); |
1207 | } | |
1208 | ||
f96d0914 FT |
1209 | static struct ufd *getskufd(struct socket *sk) |
1210 | { | |
1211 | while(1) { | |
1212 | if(sk->back->ufd != NULL) | |
1213 | return(sk->back->ufd); | |
1214 | if((sk = sk->back->pnext) == NULL) | |
1215 | break; | |
1216 | } | |
1217 | return(NULL); | |
1218 | } | |
1219 | ||
d3372da9 | 1220 | int socksettos(struct socket *sk, int tos) |
1221 | { | |
b020fb3d | 1222 | int buf; |
f96d0914 | 1223 | struct ufd *ufd; |
b020fb3d | 1224 | |
f96d0914 FT |
1225 | ufd = getskufd(sk); |
1226 | if(ufd->type != UFD_SOCK) { | |
1227 | errno = EOPNOTSUPP; | |
1228 | return(-1); | |
1229 | } | |
1230 | if(ufd->d.s.family == AF_UNIX) | |
7ab36fbd | 1231 | return(0); /* Unix sockets are always perfect. :) */ |
f96d0914 | 1232 | if(ufd->d.s.family == AF_INET) |
d3372da9 | 1233 | { |
b020fb3d | 1234 | switch(tos) |
1235 | { | |
b198bed6 | 1236 | case 0: |
1237 | buf = 0; | |
1238 | break; | |
b020fb3d | 1239 | case SOCK_TOS_MINCOST: |
18c1ae1d | 1240 | buf = 0x02; |
b020fb3d | 1241 | break; |
1242 | case SOCK_TOS_MAXREL: | |
18c1ae1d | 1243 | buf = 0x04; |
b020fb3d | 1244 | break; |
1245 | case SOCK_TOS_MAXTP: | |
18c1ae1d | 1246 | buf = 0x08; |
b020fb3d | 1247 | break; |
1248 | case SOCK_TOS_MINDELAY: | |
18c1ae1d | 1249 | buf = 0x10; |
b020fb3d | 1250 | break; |
1251 | default: | |
1252 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1253 | return(-1); | |
1254 | } | |
f96d0914 | 1255 | if(setsockopt(ufd->fd, IPPROTO_IP, IP_TOS, &buf, sizeof(buf)) < 0) |
d3372da9 | 1256 | { |
1257 | flog(LOG_WARNING, "could not set sock TOS to %i: %s", tos, strerror(errno)); | |
1258 | return(-1); | |
1259 | } | |
1260 | return(0); | |
1261 | } | |
f96d0914 | 1262 | if(ufd->d.s.family == AF_INET6) |
b020fb3d | 1263 | { |
1264 | switch(tos) | |
1265 | { | |
b198bed6 | 1266 | case 0: |
1267 | buf = 0; | |
b020fb3d | 1268 | case SOCK_TOS_MINCOST: |
1269 | buf = confgetint("net", "diffserv-mincost"); | |
1270 | break; | |
1271 | case SOCK_TOS_MAXREL: | |
1272 | buf = confgetint("net", "diffserv-maxrel"); | |
1273 | break; | |
1274 | case SOCK_TOS_MAXTP: | |
1275 | buf = confgetint("net", "diffserv-maxtp"); | |
1276 | break; | |
1277 | case SOCK_TOS_MINDELAY: | |
1278 | buf = confgetint("net", "diffserv-mindelay"); | |
1279 | break; | |
1280 | default: | |
1281 | flog(LOG_WARNING, "attempted to set unknown TOS value %i to IPv4 sock", tos); | |
1282 | return(-1); | |
1283 | } | |
1284 | /* | |
1285 | On Linux, the API IPv6 flow label management doesn't seem to | |
1286 | be entirely complete, so I guess this will have to wait. | |
1287 | ||
1288 | if(setsockopt(...) < 0) | |
1289 | { | |
1290 | flog(LOG_WARNING, "could not set sock traffic class to %i: %s", tos, strerror(errno)); | |
1291 | return(-1); | |
1292 | } | |
1293 | */ | |
1294 | return(0); | |
1295 | } | |
f96d0914 | 1296 | flog(LOG_WARNING, "could not set TOS on sock of family %i", ufd->d.s.family); |
d3372da9 | 1297 | return(1); |
1298 | } | |
1299 | ||
1300 | struct resolvedata | |
1301 | { | |
1302 | int fd; | |
1303 | void (*callback)(struct sockaddr *addr, int addrlen, void *data); | |
1304 | void *data; | |
1305 | struct sockaddr_storage addr; | |
1306 | int addrlen; | |
1307 | }; | |
1308 | ||
1309 | static void resolvecb(pid_t pid, int status, struct resolvedata *data) | |
1310 | { | |
1311 | static char buf[80]; | |
1312 | int ret; | |
1313 | struct sockaddr_in *ipv4; | |
1314 | ||
1315 | if(!status) | |
1316 | { | |
1317 | if((ret = read(data->fd, buf, sizeof(buf))) != 4) | |
1318 | { | |
b4d16e90 | 1319 | errno = ENOENT; |
d3372da9 | 1320 | data->callback(NULL, 0, data->data); |
1321 | } else { | |
1322 | ipv4 = (struct sockaddr_in *)&data->addr; | |
1323 | memcpy(&ipv4->sin_addr, buf, 4); | |
1324 | data->callback((struct sockaddr *)ipv4, sizeof(*ipv4), data->data); | |
1325 | } | |
1326 | } else { | |
b4d16e90 | 1327 | errno = ENOENT; |
d3372da9 | 1328 | data->callback(NULL, 0, data->data); |
1329 | } | |
1330 | close(data->fd); | |
1331 | free(data); | |
1332 | } | |
1333 | ||
1334 | int netresolve(char *addr, void (*callback)(struct sockaddr *addr, int addrlen, void *data), void *data) | |
1335 | { | |
1336 | int i; | |
1337 | char *p; | |
1338 | int port; | |
1339 | int pfd[2]; | |
1340 | pid_t child; | |
1341 | struct resolvedata *rdata; | |
1342 | struct sockaddr_in ipv4; | |
1343 | struct hostent *he; | |
1344 | sigset_t sigset; | |
1345 | ||
1346 | /* IPv4 */ | |
1347 | port = -1; | |
1348 | if((p = strchr(addr, ':')) != NULL) | |
1349 | { | |
1350 | *p = 0; | |
1351 | port = atoi(p + 1); | |
1352 | } | |
1353 | ipv4.sin_family = AF_INET; | |
1354 | ipv4.sin_port = htons(port); | |
1355 | if(inet_aton(addr, &ipv4.sin_addr)) | |
1356 | { | |
1357 | callback((struct sockaddr *)&ipv4, sizeof(ipv4), data); | |
1358 | } else { | |
1359 | sigemptyset(&sigset); | |
1360 | sigaddset(&sigset, SIGCHLD); | |
1361 | sigprocmask(SIG_BLOCK, &sigset, NULL); | |
1362 | if((pipe(pfd) < 0) || ((child = fork()) < 0)) | |
1363 | { | |
1364 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1365 | return(-1); | |
1366 | } | |
1367 | if(child == 0) | |
1368 | { | |
1369 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1370 | for(i = 3; i < FD_SETSIZE; i++) | |
1371 | { | |
1372 | if(i != pfd[1]) | |
1373 | close(i); | |
1374 | } | |
1375 | signal(SIGALRM, SIG_DFL); | |
1376 | alarm(30); | |
1377 | if((he = gethostbyname(addr)) == NULL) | |
1378 | exit(1); | |
1379 | write(pfd[1], he->h_addr_list[0], 4); | |
1380 | exit(0); | |
1381 | } else { | |
1382 | close(pfd[1]); | |
1383 | fcntl(pfd[0], F_SETFL, fcntl(pfd[0], F_GETFL) | O_NONBLOCK); | |
1384 | rdata = smalloc(sizeof(*rdata)); | |
1385 | rdata->fd = pfd[0]; | |
1386 | rdata->callback = callback; | |
1387 | rdata->data = data; | |
1388 | memcpy(&rdata->addr, &ipv4, rdata->addrlen = sizeof(ipv4)); | |
1389 | childcallback(child, (void (*)(pid_t, int, void *))resolvecb, rdata); | |
1390 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
1391 | return(1); | |
1392 | } | |
1393 | } | |
1394 | return(0); | |
1395 | } | |
1396 | ||
f96d0914 | 1397 | static int getlocalname(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
d3372da9 | 1398 | { |
1399 | socklen_t len; | |
1400 | struct sockaddr_storage name; | |
1401 | ||
1402 | *namebuf = NULL; | |
f96d0914 | 1403 | if(fd < 0) |
d3372da9 | 1404 | return(-1); |
1405 | len = sizeof(name); | |
f96d0914 | 1406 | if(getsockname(fd, (struct sockaddr *)&name, &len) < 0) |
d3372da9 | 1407 | { |
6fb0c6ac | 1408 | flog(LOG_ERR, "BUG: alive socket with dead fd in sockgetlocalname (%s)", strerror(errno)); |
d3372da9 | 1409 | return(-1); |
1410 | } | |
1411 | *namebuf = memcpy(smalloc(len), &name, len); | |
b870805e | 1412 | if(lenbuf != NULL) |
1413 | *lenbuf = len; | |
d3372da9 | 1414 | return(0); |
1415 | } | |
1416 | ||
f96d0914 FT |
1417 | int lstgetlocalname(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) |
1418 | { | |
1419 | struct ufd *ufd; | |
1420 | ||
1421 | ufd = lp->ufd; | |
1422 | return(getlocalname(ufd->fd, namebuf, lenbuf)); | |
1423 | } | |
1424 | ||
1425 | int sockgetlocalname(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1426 | { | |
1427 | struct ufd *ufd; | |
1428 | ||
1429 | ufd = getskufd(sk); | |
1430 | if(ufd->type != UFD_SOCK) { | |
1431 | errno = EOPNOTSUPP; | |
1432 | return(-1); | |
1433 | } | |
1434 | return(getlocalname(ufd->fd, namebuf, lenbuf)); | |
1435 | } | |
1436 | ||
eaa35963 | 1437 | static void sethostaddr(struct sockaddr *dst, struct sockaddr *src) |
1438 | { | |
1439 | if(dst->sa_family != src->sa_family) | |
1440 | { | |
1441 | flog(LOG_ERR, "BUG: non-matching socket families in sethostaddr (%i -> %i)", src->sa_family, dst->sa_family); | |
1442 | return; | |
1443 | } | |
1444 | switch(src->sa_family) | |
1445 | { | |
1446 | case AF_INET: | |
1447 | ((struct sockaddr_in *)dst)->sin_addr = ((struct sockaddr_in *)src)->sin_addr; | |
1448 | break; | |
1449 | case AF_INET6: | |
1450 | ((struct sockaddr_in6 *)dst)->sin6_addr = ((struct sockaddr_in6 *)src)->sin6_addr; | |
1451 | break; | |
1452 | default: | |
1453 | flog(LOG_WARNING, "sethostaddr unimplemented for family %i", src->sa_family); | |
1454 | break; | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | static int makepublic(struct sockaddr *addr) | |
d3372da9 | 1459 | { |
6fb0c6ac | 1460 | int ret; |
eaa35963 | 1461 | socklen_t plen; |
1462 | struct sockaddr *pname; | |
1463 | ||
1464 | if((ret = getpublicaddr(addr->sa_family, &pname, &plen)) < 0) | |
1465 | { | |
1466 | flog(LOG_ERR, "could not get public address: %s", strerror(errno)); | |
1467 | return(-1); | |
1468 | } | |
1469 | if(ret) | |
1470 | return(0); | |
1471 | sethostaddr(addr, pname); | |
1472 | free(pname); | |
1473 | return(0); | |
1474 | } | |
1475 | ||
f96d0914 | 1476 | static int getremotename(int fd, struct sockaddr **namebuf, socklen_t *lenbuf) |
eaa35963 | 1477 | { |
d3372da9 | 1478 | socklen_t len; |
6fb0c6ac | 1479 | struct sockaddr *name; |
f96d0914 FT |
1480 | |
1481 | switch(confgetint("net", "mode")) { | |
d3372da9 | 1482 | case 0: |
1483 | *namebuf = NULL; | |
f96d0914 | 1484 | if(!getlocalname(fd, &name, &len)) { |
6fb0c6ac | 1485 | *namebuf = name; |
1486 | *lenbuf = len; | |
eaa35963 | 1487 | makepublic(name); |
6fb0c6ac | 1488 | return(0); |
1489 | } | |
1490 | flog(LOG_ERR, "could not get remotely accessible name by any means"); | |
1491 | return(-1); | |
d3372da9 | 1492 | case 1: |
1493 | errno = EOPNOTSUPP; | |
1494 | return(-1); | |
1495 | default: | |
1496 | flog(LOG_CRIT, "unknown net mode %i active", confgetint("net", "mode")); | |
1497 | errno = EOPNOTSUPP; | |
1498 | return(-1); | |
1499 | } | |
1500 | } | |
1501 | ||
f96d0914 FT |
1502 | int sockgetremotename(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) |
1503 | { | |
1504 | struct ufd *ufd; | |
1505 | ||
1506 | ufd = getskufd(sk); | |
1507 | if(ufd->type != UFD_SOCK) { | |
1508 | errno = EOPNOTSUPP; | |
1509 | return(-1); | |
1510 | } | |
1511 | if(ufd->fd < 0) { | |
1512 | errno = EBADF; | |
1513 | return(-1); | |
1514 | } | |
1515 | return(getremotename(ufd->fd, namebuf, lenbuf)); | |
1516 | } | |
1517 | ||
1518 | int lstgetremotename(struct lport *lp, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1519 | { | |
1520 | struct ufd *ufd; | |
1521 | ||
1522 | ufd = lp->ufd; | |
1523 | return(getremotename(ufd->fd, namebuf, lenbuf)); | |
1524 | } | |
1525 | ||
d29853b1 | 1526 | int sockgetremotename2(struct socket *sk, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) |
1527 | { | |
1528 | struct sockaddr *name1, *name2; | |
1529 | socklen_t len1, len2; | |
f96d0914 FT |
1530 | struct ufd *ufd1, *ufd2; |
1531 | ||
1532 | ufd1 = getskufd(sk); | |
1533 | ufd2 = getskufd(sk2); | |
1534 | if((ufd1->type != UFD_SOCK) || (ufd2->type != UFD_SOCK)) { | |
1535 | errno = EOPNOTSUPP; | |
1536 | return(-1); | |
1537 | } | |
1538 | if(ufd1->d.s.family != ufd2->d.s.family) | |
1539 | { | |
1540 | flog(LOG_ERR, "using sockgetremotename2 with sockets of differing family: %i %i", ufd1->d.s.family, ufd2->d.s.family); | |
1541 | return(-1); | |
1542 | } | |
1543 | if(getremotename(ufd1->fd, &name1, &len1)) | |
1544 | return(-1); | |
1545 | if(getremotename(ufd2->fd, &name2, &len2)) { | |
1546 | free(name1); | |
1547 | return(-1); | |
1548 | } | |
1549 | sethostaddr(name1, name2); | |
1550 | free(name2); | |
1551 | *namebuf = name1; | |
1552 | *lenbuf = len1; | |
1553 | return(0); | |
1554 | } | |
1555 | ||
1556 | int lstgetremotename2(struct lport *lp, struct socket *sk2, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1557 | { | |
1558 | struct sockaddr *name1, *name2; | |
1559 | socklen_t len1, len2; | |
1560 | struct ufd *ufd1, *ufd2; | |
d29853b1 | 1561 | |
f96d0914 FT |
1562 | ufd1 = lp->ufd; |
1563 | ufd2 = getskufd(sk2); | |
1564 | if(ufd2->type != UFD_SOCK) { | |
1565 | errno = EOPNOTSUPP; | |
1566 | return(-1); | |
1567 | } | |
d334fbb5 | 1568 | if(ufd1->d.l.family != ufd2->d.s.family) |
d29853b1 | 1569 | { |
d334fbb5 | 1570 | flog(LOG_ERR, "using lstgetremotename2 with sockets of differing family: %i %i", ufd1->d.l.family, ufd2->d.s.family); |
d29853b1 | 1571 | return(-1); |
1572 | } | |
f96d0914 | 1573 | if(getremotename(ufd1->fd, &name1, &len1)) |
d29853b1 | 1574 | return(-1); |
f96d0914 | 1575 | if(getremotename(ufd2->fd, &name2, &len2)) { |
d29853b1 | 1576 | free(name1); |
1577 | return(-1); | |
1578 | } | |
1579 | sethostaddr(name1, name2); | |
1580 | free(name2); | |
1581 | *namebuf = name1; | |
1582 | *lenbuf = len1; | |
1583 | return(0); | |
1584 | } | |
1585 | ||
f96d0914 FT |
1586 | int getucred(struct socket *sk, uid_t *uid, gid_t *gid) |
1587 | { | |
1588 | struct ufd *ufd; | |
1589 | ||
1590 | ufd = getskufd(sk); | |
1591 | if(ufd->type != UFD_SOCK) { | |
1592 | errno = EOPNOTSUPP; | |
1593 | return(-1); | |
1594 | } | |
1595 | if(ufd->d.s.family != AF_UNIX) { | |
1596 | errno = EOPNOTSUPP; | |
1597 | return(-1); | |
1598 | } | |
1599 | *uid = ufd->d.s.ucred.uid; | |
1600 | *gid = ufd->d.s.ucred.gid; | |
1601 | return(0); | |
1602 | } | |
1603 | ||
81286a22 FT |
1604 | /* void sockblock(struct socket *sk, int block) */ |
1605 | /* { */ | |
1606 | /* struct ufd *ufd; */ | |
f96d0914 | 1607 | |
81286a22 FT |
1608 | /* ufd = getskufd(sk); */ |
1609 | /* ufd->ignread = block; */ | |
1610 | /* } */ | |
f96d0914 FT |
1611 | |
1612 | int sockfamily(struct socket *sk) | |
1613 | { | |
1614 | struct ufd *ufd; | |
1615 | ||
1616 | ufd = getskufd(sk); | |
1617 | if(ufd->type != UFD_SOCK) { | |
1618 | errno = EOPNOTSUPP; | |
1619 | return(-1); | |
1620 | } | |
1621 | return(ufd->d.s.family); | |
02a705ad FT |
1622 | } |
1623 | ||
1624 | int sockpeeraddr(struct socket *sk, struct sockaddr **namebuf, socklen_t *lenbuf) | |
1625 | { | |
f96d0914 FT |
1626 | struct ufd *ufd; |
1627 | ||
1628 | ufd = getskufd(sk); | |
1629 | if(ufd->type != UFD_SOCK) { | |
1630 | errno = EOPNOTSUPP; | |
1631 | return(-1); | |
1632 | } | |
1633 | if(ufd->d.s.remote == NULL) | |
1634 | return(-1); | |
1635 | *namebuf = memcpy(smalloc(ufd->d.s.remotelen), ufd->d.s.remote, ufd->d.s.remotelen); | |
1636 | if(lenbuf != NULL) | |
1637 | *lenbuf = ufd->d.s.remotelen; | |
1638 | return(0); | |
02a705ad FT |
1639 | } |
1640 | ||
1641 | char *formatsockpeer(struct socket *sk) | |
1642 | { | |
1643 | struct sockaddr *name; | |
1644 | socklen_t nlen; | |
1645 | char *ret; | |
1646 | ||
1647 | if(sockpeeraddr(sk, &name, &nlen)) | |
1648 | return(NULL); | |
1649 | ret = formataddress(name, nlen); | |
1650 | free(name); | |
1651 | return(ret); | |
1652 | } | |
1653 | ||
99a28d47 | 1654 | int addreq(struct sockaddr *x, struct sockaddr *y) |
1655 | { | |
1656 | struct sockaddr_un *u1, *u2; | |
1657 | struct sockaddr_in *n1, *n2; | |
1658 | #ifdef HAVE_IPV6 | |
1659 | struct sockaddr_in6 *s1, *s2; | |
1660 | #endif | |
1661 | ||
1662 | if(x->sa_family != y->sa_family) | |
1663 | return(0); | |
1664 | switch(x->sa_family) { | |
1665 | case AF_UNIX: | |
1666 | u1 = (struct sockaddr_un *)x; u2 = (struct sockaddr_un *)y; | |
1667 | if(strncmp(u1->sun_path, u2->sun_path, sizeof(u1->sun_path))) | |
1668 | return(0); | |
1669 | break; | |
1670 | case AF_INET: | |
1671 | n1 = (struct sockaddr_in *)x; n2 = (struct sockaddr_in *)y; | |
1672 | if(n1->sin_port != n2->sin_port) | |
1673 | return(0); | |
1674 | if(n1->sin_addr.s_addr != n2->sin_addr.s_addr) | |
1675 | return(0); | |
1676 | break; | |
c8a729d7 | 1677 | #ifdef HAVE_IPV6 |
99a28d47 | 1678 | case AF_INET6: |
1679 | s1 = (struct sockaddr_in6 *)x; s2 = (struct sockaddr_in6 *)y; | |
1680 | if(s1->sin6_port != s2->sin6_port) | |
1681 | return(0); | |
1682 | if(memcmp(s1->sin6_addr.s6_addr, s2->sin6_addr.s6_addr, sizeof(s1->sin6_addr.s6_addr))) | |
1683 | return(0); | |
1684 | break; | |
c8a729d7 | 1685 | #endif |
99a28d47 | 1686 | } |
1687 | return(1); | |
1688 | } | |
1689 | ||
d3372da9 | 1690 | char *formataddress(struct sockaddr *arg, socklen_t arglen) |
1691 | { | |
d3372da9 | 1692 | struct sockaddr_in *ipv4; |
1693 | #ifdef HAVE_IPV6 | |
1694 | struct sockaddr_in6 *ipv6; | |
1695 | #endif | |
1696 | static char *ret = NULL; | |
1697 | char buf[1024]; | |
1698 | ||
1699 | if(ret != NULL) | |
1700 | free(ret); | |
1701 | ret = NULL; | |
1702 | switch(arg->sa_family) | |
1703 | { | |
1704 | case AF_UNIX: | |
6a97462e | 1705 | ret = sstrdup("Unix socket"); |
d3372da9 | 1706 | break; |
1707 | case AF_INET: | |
1708 | ipv4 = (struct sockaddr_in *)arg; | |
1709 | if(inet_ntop(AF_INET, &ipv4->sin_addr, buf, sizeof(buf)) == NULL) | |
1710 | return(NULL); | |
1711 | ret = sprintf2("%s:%i", buf, (int)ntohs(ipv4->sin_port)); | |
1712 | break; | |
1713 | #ifdef HAVE_IPV6 | |
1714 | case AF_INET6: | |
1715 | ipv6 = (struct sockaddr_in6 *)arg; | |
1716 | if(inet_ntop(AF_INET6, &ipv6->sin6_addr, buf, sizeof(buf)) == NULL) | |
1717 | return(NULL); | |
fc7f7735 | 1718 | ret = sprintf2("[%s]:%i", buf, (int)ntohs(ipv6->sin6_port)); |
d3372da9 | 1719 | break; |
1720 | #endif | |
1721 | default: | |
1722 | errno = EPFNOSUPPORT; | |
1723 | break; | |
1724 | } | |
1725 | return(ret); | |
1726 | } | |
1727 | ||
1728 | #if 0 | |
1729 | ||
1730 | /* | |
1731 | * It was very nice to use this, but it seems | |
1732 | * to mess things up, so I guess it has to go... :-( | |
1733 | */ | |
1734 | ||
1735 | static int formataddress(FILE *stream, const struct printf_info *info, const void *const *args) | |
1736 | { | |
1737 | struct sockaddr *arg; | |
1738 | socklen_t arglen; | |
1739 | struct sockaddr_un *UNIX; /* Some wise guy has #defined unix with | |
1740 | * lowercase letters to 1, so I do this | |
1741 | * instead. */ | |
1742 | struct sockaddr_in *ipv4; | |
1743 | int ret; | |
1744 | ||
1745 | arg = *(struct sockaddr **)(args[0]); | |
1746 | arglen = *(socklen_t *)(args[1]); | |
1747 | switch(arg->sa_family) | |
1748 | { | |
1749 | case AF_UNIX: | |
1750 | UNIX = (struct sockaddr_un *)arg; | |
1751 | ret = fprintf(stream, "%s", UNIX->sun_path); | |
1752 | break; | |
1753 | case AF_INET: | |
1754 | ipv4 = (struct sockaddr_in *)arg; | |
1755 | ret = fprintf(stream, "%s:%i", inet_ntoa(ipv4->sin_addr), (int)ntohs(ipv4->sin_port)); | |
1756 | break; | |
1757 | default: | |
1758 | ret = -1; | |
1759 | errno = EPFNOSUPPORT; | |
1760 | break; | |
1761 | } | |
1762 | return(ret); | |
1763 | } | |
1764 | ||
1765 | static int formataddress_arginfo(const struct printf_info *info, size_t n, int *argtypes) | |
1766 | { | |
1767 | if(n > 0) | |
1768 | argtypes[0] = PA_POINTER; | |
1769 | if(n > 1) | |
1770 | argtypes[1] = PA_INT; /* Sources tell me that socklen_t _must_ | |
1771 | * be an int, so I guess this should be | |
1772 | * safe. */ | |
1773 | return(2); | |
1774 | } | |
1775 | #endif | |
1776 | ||
1777 | static int init(int hup) | |
1778 | { | |
1779 | if(!hup) | |
1780 | { | |
1781 | /* | |
1782 | if(register_printf_function('N', formataddress, formataddress_arginfo)) | |
1783 | { | |
1784 | flog(LOG_CRIT, "could not register printf handler %%N: %s", strerror(errno)); | |
1785 | return(1); | |
1786 | } | |
1787 | */ | |
1788 | } | |
1789 | return(0); | |
1790 | } | |
1791 | ||
1792 | static void terminate(void) | |
1793 | { | |
f96d0914 FT |
1794 | /* |
1795 | while(ufds != NULL) | |
1796 | freeufd(ufds); | |
1797 | */ | |
d3372da9 | 1798 | } |
1799 | ||
1800 | static struct module me = | |
1801 | { | |
1802 | .name = "net", | |
1803 | .conf = | |
1804 | { | |
1805 | .vars = myvars | |
1806 | }, | |
1807 | .init = init, | |
1808 | .terminate = terminate | |
1809 | }; | |
1810 | ||
1811 | MODULE(me) |